Hipanda Filter Foam Sponges, Bio Sponge Filter Media Pad, Cut-to-Size Foam for Aquarium Fish Tank (10" x 4.7" x 2.75") : Amazon.ca: Pet Supplies
Silverlake Craft Foam Block - 5 Pack of 12x12x1.5 EPS Polystyrene Boards for Crafting, Modeling, Art Projects and Floral Arrangements - Sculpting Sheet for DIY School & Home Art Projects (5) : Amazon.ca: Home
Foam Cut to Size | Foam Packaging Solutions from Styrotech